Trogon citreolus -- Citreoline trogon; Trogón citrino. Alternate name on piece: Troctes massenae Rough layout drawing, color added; one of 3 birds eliminated from published plate, and the positions of the other 2 exchanged; a great deal of very heavy overlining and erasure; Curtis citation (13-4958) lined through; large letter "I." Artist's name(s): Gould, John; Richter, Henry Constantine. There may or not be a basic sketch by Gould under all the later activity, but the main work is consistent with Richter's work on a preliminary sketch, and then Gould would appear to have gone over outlines and accented shapes and sizes;